Answer:
A)CI 90 % = [ 7,2103 ; 8,7297]
B) s = √ ∑(xi - xp)²/n-1
c) z is the score for the given significance level in this case is 1,64
Step-by-step explanation:
For a confidence Interval of 90%, the significance level is α = 10 %
α = 0,1 α/2 = 0,05 and from z-table we find z(c) for 0,05 z(c) = 1,64
CI 90 % = [ x ± z(c) * s/√n ]
CI 90 % = [ 7,97 ± 1,64 * 2.62/√32]
CI 90 % = [ 7,97 ± 0,7597]
CI 90 % = [ 7,2103 ; 8,7297]
B) To calculate the standard deviation of the sample the equation is:
s = √ ∑(xi - xp)²/n-1
xi - xp is the difference between each one of the elements of the sample
xp is the mean or average of the elements of the sample and n is the sample size
Ernie has 4 yellow straws, 3 green straws, and 1 blue straw in a kitchen drawer. Each straw is the same size and shape. Ernie pulls out one straw from from the drawer without looking. What is the probability of Ernie pulling out a green straw.
A. 1/8
B. 3/8
C. 5/8
D. 7/8
Answer:
3/8
Step-by-step explanation:
please help me!! no links<3
PLEASE HELP ME!!
3/7 + 2/7
Answer:
5/7
decimal form : 0.714285-
Step-by-step explanation:
5 athletes are in a 100k race. How many different ways can they finish based on their order.
Answer:
It's 120 different ways I think
Step-by-step explanation:
Find the scale factor of a model train if the scale is 1 inch = 4 feet.
Answer:
1
Step-by-step explanation:
what times twelve is exactly 30
the answer is most likely a mixed number
Answer:
2.5 or 2 and 1/2
Step-by-step explanation:
30/12 = 2.5
There are two wholes that fit in 30 with a remainder of half of a whole.
2.5 translates to 2 and 1/2
Answer:
Hello! answer: 2½
Step-by-step explanation:
Assuming you mean mixed number as in fraction I did 30 ÷ 12 = 2.5 and converted it to a mixed number and since 2½ × 12 = 30 the answer is 2½ Hope that helps!
im sorry but i need help with this seriously difficult question
what is 1+1?
Answer:
2
Step-by-step explanation:
1 + 1 = 2
Answer:
1+1 equals 2 ok are you a ok bye
Please help with the mean, median and range, look at the picture!
Answer:
Mean: 39 Median: 32.5 Range: 62
Step-by-step explanation:
First, you organize the numbers from least to greatest, so 10 15 19 46 72 72. The median is the middle number, so the average of 19 and 46( 32.5). The Range is the largest number minus the smallest number, so 62. and the mean is all the numbers added up, then divided by the amount of numbers, so 234/6 or 39.
Tina spends 25% of her day in school. She spends 1/3 of her day sleeping. She spends 1/8 of her time at soccer practice. How many free hours does Tina have during the day? I NEED THIS ANSWER NOW
Answer:
7 hours
Step-by-step explanation:
24 hours - 25% - 1/3 - 1/8 =
18 - 8 - 1/8 =
10 - 1/8 =
7
Sumaya's soccer coach randomly passes out three kinds of fruit bars (strawberry, blueberry, and apple) after each game. Sumaya has two games one morning. This table lists the sample space of outcomes. Second game Strawberry Blueberry Apple Strawberry SS SB SA First game Blueberry BS BB BA Apple AS AB AA In the event SB, Sumaya gets a strawberry bar after game 1 and a blueberry bar after game 2. Which outcome would be included in the event gets only one apple bar"?
Answer:
A. AA
Step-by-step explanation:
Answer: AS is your answer!
Step-by-step explanation: AS has only one apple bar, which if you have the 5.1,2 Exam, you got this!
How do you do this ??????????????????????
Answer:
b
Step-by-step explanation:
you can take the rectagel and you x the rectagel
hi! please help i’ll give brainliest
Answer:
wave erosion
Step-by-step explanation:
Answer:
Wave Deposition
Step-by-step explanation:
Every person has blood type O, A, B, or AB. A random group of people are blood-typed, and the results are shown in the table. A 2-column table with 4 rows is shown. The first column is labeled Blood Type with entries O, A, B, AB. The second column is labeled Number of People with entries 22, 20, 6, 2. Use the table to determine the following probabilities. The probability that a randomly chosen person from this group has type B is . The probability that a randomly chosen person from this group has type AB is . The probability that a randomly chosen person from this group has type B or type AB blood is
Answer:
3/25 for type B, 1/25 for type AB, and 4/25 for both
Step-by-step explanation:
O goes to 22
A goes to 20
B goes to 6
AB goes to 2
22+20+6+2 = 50, so (number of people with a certain blood type)/50 = the answers for each question.
A small pond contains nine catfish and two bluegill. If nine fish are caught at random, what is the probability that all of them are catfish?
Answer:
63/3465
Step-by-step explanation:
A small pond contains nine catfish and two bluegill.
Total number of fish = 9 catfish + 2 blue hill
= 11 fishes
Probability of picking one catfish = P(C) = P(9/11)
Probability of picking one bluegill = P(B) = P(2/11)
If nine fish are caught at random, the probability that all of them are catfish is calculated as:
= P(9 Catfish) = 9/11 × 8/10 × 7/9 × 6/8 × 5/7 × 4/6 × 3/5 × 2/4 × 1/3
= 362880/19958400
Further simplifying to the simplest fraction:
= 189/10395
= 63/3465
Solve by completing the square
2x^2 + 14 = 4x
Answer:
Step-by-step explanation:
Use the formula (b/2)^2 in order to create a new term. Solve for x by using this
term to complete the square.
x = 1 ± i√6
A 10 foot long fence post is placed in a hole that is 3 feet deep.
How much of the post is above ground?
Answer:
7 feet
Step-by-step explanation:
10 - 3 = 7
Which power of 10 should be in the to make the equation true?
73.4: = 00.734
Answer:
-2 power.
Step-by-step explanation:
Write the following expression using a single exponent. 4^6 ÷ 4^-2
Answer:
4^8.
Step-by-step explanation:
4^6 ÷ 4^-2 when dividing we subtract exponents , so we have:
4^(6- (-2))
= 4^8.
angle A and angle B are complementary angles. If m angle A = (x-16)degrees and m angle B = (3x+28)degrees, then find the measure of angle A
Answer:
[tex]4x \times 448[/tex]
Step-by-step explanation:
A=
[tex]a = (x - 16)[/tex]
[tex]b = (3x + 28)[/tex]
So you add :
[tex]x \: and3x[/tex]
To get
[tex]4x[/tex]
Then you do :
[tex]16 \times 28[/tex]
To get :
[tex]448[/tex]
Answer is :
[tex]4x \times 448[/tex]
Find the length of side x in simplest radical form with a rational denominator.
45°
X
45°
6
Answer:
square root 6
Step-by-step explanation:
Solve: 7×-4=-8×+8
hurry!
Answer:
x = 4/5
FILLER FILLER FILLER
Elapsed time 2 hr 37 min, end time: 1:15. start time?
Answer:
10:38
Step-by-step explanation:
2 hours back from 1:15
11:15
37 minutes back from 11:15
10:38
The start time is 10:38.
Answer:
10:38 am
Step-by-step explanation:
You can use a number line or clock to find the start time
x = 0:15 min - 0:37 min x = -0:22 min
y = 60 min - 22 min y = 38 min
Time = 12:38
1st, subtract the minutes from the end time. If the value is negative, it means that the time goes back into the previous hour.
Subtract from 60 minutes. Time after going back 37 minutes.
Next, subtract the hours from the time. 11:38 am 10:38 am and 10:38
Next, subtract the hours from the time. Going back 1 hour. Going back 2 hour.
Start time is 10:38
No links need help ASAP
Answer:
≈10502.7
Step-by-step explanation:
Hi there!
»»————- ★ ————-««
I believe your answer is:
160π cubic units.
»»————- ★ ————-««
Here’s why:
The formula for volume of a cylinder is:
[tex]V=\pi r^2h[/tex]
[tex]\boxed\text{Key:}\\\\[/tex][tex]\boxed{\text{Key:}}\\\\\text{R - Radius}\\\\\text{H - Height}[/tex]
⸻⸻⸻⸻
We are given:
The height of 10 units.The radius of 4 units.⸻⸻⸻⸻
We will replace the 'r' with '4' and we will replace the 'h' with '10'.
⸻⸻⸻⸻
There are two ways to express the answer, either an exact answer in terms of pi or an approximation using 3.14 for pi.
For this answer, I will use the exact terms.
⸻⸻⸻⸻
[tex]\boxed{\text{Finding the Volume of the Cylinder:}}\\\\V=\pi 4^210\\\\-------\\\rightarrow V=4^2*10*\pi \\\\\rightarrow V=16*10*\pi\\\\\boxed{V=160\pi}[/tex]
The answer should be [tex]\boxed{160\pi\text{ units} ^3.}[/tex]
»»————- ★ ————-««
Hope this helps you. I apologize if it’s incorrect.
Help me please I need it
Step-by-step explanation:
see the photo for explanation
Answer:
We are finding hypotenuse
3^2 + 2.5^2
9 + 6.25 = 15.25
3.9^2 = 15.21 close enough.
3.9 would be your answer.
When finding the hypotenuse, we square the two given lengths add them up and then that number you get from adding them up, there should be a number that will be squared that will equal that number that you added up.
What is the first step in solving this equation? 2(3x - 4) = 3x + 1 a combine like terms b move x to the other side c distributive property d multiplication
What is the volume of this rectangular prism?
Answer:
20 cm³
Step-by-step explanation:
I’ll give out brainlest to whoever answers this correctly!!
Answer:
7
Step-by-step explanation:
4x3.5=14
14x 1/2 = 7
Answer:
7 ft
Step-by-step explanation:
you multiply both sides so 4 x 3.5 = 14
and given it is a triangle you have to multiply by 1/2
so 14 x 0.5 = 7
that is your answer
A right triangular prism and its net are shown below.
(All lengths are in centimeters.)
Answer:
A=4
B=8
C=6
D=10
SA=208
Surface area=bh+(s1+s2+s3)H
=6×8+(4+6+10)(8)
=208
Step-by-step explanation:
Answer:
Step-by-step explanation:
what is 35 x 345? Solve and I will give you money
Answer:
12075
Step-by-step explanation:
35 x 345 = 12075
Answer:
12075
Step-by-step explanation:
compare and contrast the data represented in the double box plot below
Answer:
and wheres the box plot?